Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Revenue:
Revenue		$ 9,938	$ 7,843
Cost of revenue:
Cost of revenue		3,726	3,599
Gross profit		6,212	4,244
Operating expenses:
Sales and marketing		5,536	6,298
Research, development and engineering		6,741	7,826
General and administrative		4,520	4,627
Amortization expense on acquired intangible assets		272	260
Total operating expenses		17,069	19,011
Operating loss		(10,857)	(14,767)
Other income, net		528	745
Loss before income taxes		(10,329)	(14,022)
Provision for income taxes		(9)	(18)
Net loss		$ (10,338)	$ (14,040)
Loss per share:
Loss per share — basic (in dollars per share)		$ (0.5)	$ (0.7)
Loss per share — diluted (in dollars per share)		$ (0.5)	$ (0.7)
Weighted average shares outstanding — basic (in shares)		20,730	20,093
Weighted average shares outstanding — diluted (in shares)		20,730	20,093
Comprehensive loss:
Unrealized gain (loss) on marketable securities, net of tax of $0		$ (31)	$ 101
Foreign currency translation adjustment, net of tax of $0		(372)	775
Other comprehensive income (loss)		(403)	876
Net loss		(10,338)	(14,040)
Comprehensive loss		(10,741)	(13,164)
Subscription [Member]
Revenue:
Revenue		5,762	3,885
Cost of revenue:
Cost of revenue	[1]	747	795
Service [Member]
Revenue:
Revenue		4,176	3,958
Cost of revenue:
Cost of revenue	[1]	1,839	1,715
Amortization Expense On Acquired Intangible Assets [Member]
Cost of revenue:
Cost of revenue		$ 1,140	$ 1,089

[1] Cost of revenue for Subscription and Service excludes Amortization expense on acquired intangible assets.